Hi Kuggazer ! Thanks for making this game, it's becoming really great !
I don't know if you are looking for suggestions, but here are 3 :
For the gameplay : It would be nice if the girl would initiate some events by themselves now that they are becoming naughtier. Otherwise it feels nothing in the world happens if we are doing nothing. You have done some already, but it would be great to have more. I think it helps keeping your world more alive.
For a new girl : What about a married woman or a girl with a boyfriend ? If I'm correct all the girls in the game are single, it would add some spice !
Finally : An option to shave the girls (I know not everyone like that, so it would be optional). Not sure how much work it would require for you though.